63 21 180 Removing and installing/replacing left or right rear light (in side panel): All:
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW M3, 2005 BMW M3, 2004 BMW M3, 2003 BMW M3, and 2002 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
Installation:
Make sure rear light seal is correctly seated, replace if necessary.
Make sure there is a uniform gap all round between outer rear light and side panel.